Machine for shaping surfaces of road-beds



4(No new.) A I' s sheets-sheet 1.

D. A. WALKER. MAGHINB EUR SHAPING SURFAGBS 0I' EDAD BEDS.

Patented Jur-1e 9, 1896.

3 Sheets-Sheet 2.

(No Model.)

D. A. WALKER. MACHINE FOR SHAPING SURFAGES 0F ROAD BEDS.

ANDREW E (.)RMIIIAM4 PIIOTOUWQWASHINBTUN. D C

3 Sheets-Sheet 3.

No Model.) D. A. WALKER. MACHINE POR SHAPING SURPAGBS 0F ROAD BEDS. No. 561,633. Patented June 9, 1896.

3 i X3 X \\\m$\\\ QQMRW mv .if//f mmm mm ANDRE!! B GRAHAM.FHOYO'UMQWASNINGYUN D C UNITED STATES Ferrini" trice.

DAVID ADDISON IVALKER,`OF CINCINNATI, OIIIO.

MACHINE FOR SHAPING SURFACES OF ROAD-BEDS.

SPECIFICATION forming part of Letters Patent No. 561,633, dated June 9, 1896.

Application ilefl July 2, 1894. Serial No. 516,275. (No model.)

To @ZZ 1.071.071?, t may corto-crit.-

Be it known that I, Dnvin ADDISON WALK- ER, a citizen of the United Sta-tes, and a resident of the city of Cincinnati, in the county of Ila-milton and State of Ohio, have invented a certain new and useful Machine for Shaping the Surface of Street-Beds and Road-Beds in the Process of Constructing the Street or Road, of which the following is a specification.

The several features of my invention and the various advantages resulting from their use, conjointly or otherwise, will be apparent irom the following description and claims.

In the accompanying drawings, making a part ot' this application, and in which similar letters of reference indicate corresponding parts, Figure l, Sheet l, is a front view in perspective of a machine, illustrating my invention and adapted for use in a street from a curb to the middle (center) of the street. Fig. 2, same sheet, is an enlarged elevation of one end of the said machine and showing in section a part of a street-pave ment in process of construction. Fig. 3, same sheet, is a plan or elevation of either one of the ends of the machine shown in Fig. l. Fig. i, Sheet 2, is a view in perspective of a machine embodying my invention and illustrating the application of my invention in a machine extending across the street from curb to curb. Fig. 5, Sheet 3, shows in perspective the mode in which my invention can be applied with the best advantage to form the road-bed between the railroad-tracks at the desired level and height. Fig. 6 is an enlarged view, partly in elevation, partly in section, and illustrating the mode in which my machine shown in Fig. 5 operates.

I will now more particularlydescribe my invention.

lVhere there are no tracks or rails in the street, the machine shown in Figs. 3 and et is the one preferred.

A and A2 indicate parallel beams, located edge downward and united together near each end by the respective cross bridge-pieces I3 B. This structure A A .B B is supported at cach end on wheels or rollers C C, adapted to roll upon the top of the adjacent curb X. These wheels are suitably connected to the struc-ture or forming part A A2. The prei erred means are the iron bars D, bolted as horizontal rollers E are present, and each rotates on its vertical axle or spindle F. It will be understood that each roller projects sonicwhat beyond thc adjacent end of the beam to which it is connected.

Means 'for the traction of the machine are provided. A preferred description of such means is shown, and consists of the midtraction bar G, fastened to the beams A A at their mid-length, and the oblique traction bars or rods G2 G2, connected at their rear ends to their respective sides of the beams almost midway between the mid-length of thc beam and the end of the latter. All of these bars G G2 G2 converge and are connected together at a point, as G5, at a distance in front of the beams A A. In Fig. 4; of the drawings the connection of the central traction to thc beams is to be understood, because the beams are centrally broken away and approximated to bring their ends and the curbs of the street within the limits assigned for the drawing.

Between the end bridging B B intermediate bridging-pieces H are present between the beams A A, and iron straps, as IIE, bolted to these bridging-pieces II and to the beams A A, substantially as shown, secure the beams and bridging firmly together in one compact whole. At the junction G3 of the tractioirbars G G2 G2 is located a ring G1 or a handle. Traction-power is here applied. The lower edges or bottoms of the beams are shaped alike, and in the saine plane at any given point on a line running parallel to the length of the street. The shape or contour of the bottoms of the beams A will correspond to that of the street to be made. Inasmuch as streets are ordinarily higher in the middle than at the curb the beams will usually be concave at their lower edge. The higher the crown of the street the more con cave will be the beams.

In practice the height of the crown of thc street above its height at the curb will vary from one to six inches. The depth of the bar (vertically) is sufficient to reach down to the point where the leveling is to be done by the machine.

I will now describe the operation of my invention.

lVhere the pavement consists, first,of a subfoundation of concrete, secondly of a layer of sand superimposed thereon, and, lastly, of vitriied brick or granite blocks or the like set on this sand. The sand or equivalent bedding is then laid upon the concrete. My machine is then pulled over the sand. The rollers C C rest on the top of the curb and the rollers E E each revolve against the inner side of the adjacent curb. The lower edge of the front beam A forces all superfluous sand before it and reduces the sand everywhere to the proper height for laying thereon the stone or brick blocks wherewith the street is to be paved. The upper surface of the sand or equivalent substance here laid on will then have substantially the shape or con formation shown in Fig. 2, and this will be the fact, although the upper surface of the concrete below the sand is uneven and does not carry out the proper curve-viz. the curve the upper surface of the street is to assume. To thus shape the upper surface of the sand, the., in readiness for the paving to be set thereon is with my machine the work of only a few minutes. Ileretofore such shaping has been done in pieces by means of what is known as a loop, a small instrument doing but a portion of the width of the street at a time, and compelling frequent retractions of the loop over the same place and over the joining spaces between this place and others run over with the loop. The work accomplished by the loop is also less symmetrical than that accomplished by the use of my invention.

I will now describe the other machines made according to my invention.

In Fig. lis shown a machine adapted to shape the surface of the street bedding or layer S for on e-half the width of the street at a time-viz., between the curb and the center of the street. In this instance the wheels C C of one end rest upon the curb X and the horizontal wheels E rest against the side of the curb. At the center of the street I lay down a temporary center beam or rail X2. This latter is preferably of iron. Upon this rail run the adjacent vertical wheels C C of the machine,and against the side of this beam run the horizontal wheels E E. (Not seen in Fig. l because hidden by the beam X2.) As fast as one portion of the streetis shaped the beam is advanced along the center of said street and the machine again moved forward. The other side of the street is duly shaped in like manner.

Fig. 5 illustrates a machine adapted to forni the surface of the street between rails I of a track. In such a case the rollers C may have flanges C2 and the end horizontal rollers be omitted, the flanges of the wheels C keeping the ends of beams A at a proper distance from the track-supports. A similar device can be used between adjacent rails of two parallel street-tracks. Inasmueh as these machines do not differ inlprinciple nor substantially in detail of construction from that shown in Fig. 4, already described, I dismiss further description of them with the observation that the bottoni surface of the beams A of each one is formed so as to properly shape that portion of the street for which they are especially designed.

rlhe application of my invention is quite wide and farther reaching than heretofore indicated. One instance of this is in relation to asphalt. There the latter substance is to forni the upper surface of the pavement, my machine is successfully employed to form its upper surface. The asphalt when first laid and spread down on the foundation is of a grauular nature. Then my machine is quickly drawn over it and at once shapes it, so that no further labor is required in shaping it, and it (the pavement) is ready after the proper time in which the asphalt will harden has elapsed for the heavy roller to be applied.

Vhere the street or road-bed to be shaped has no curbs, temporary rails may be employed in lieu thereof.

The length of the beam or bea-111s A may vary. r

lVhere there is a street-track or there are street-tracks, the curb may be utilized at one end of the beam A and also the track-rail nearest the other end of the said beam for supporting the rollers on wheels C.

Instead of two beams A A there may be one large single beam A; but the latter construction is likely to be unwieldy and is obviously not so mechanically excellent as the compound construction shown in the drawings.

Under the title traction power is in` eluded the drawing of the device by hand or by horse, or by steam-engine or the tractionmotor, the.

XVhat I claim as new and of my invention, and desire to secure by Letters Patent, is-

1. A machine for shaping road and street beds, consisting of the piece A, having its bottom conformed to the curve which the surface street in crosssection is to have, and provided at its ends with vertical rollers C, and with the horizontal rollers E, substantially as and for the purposes specified.

2. A machine for shaping road and street beds, consisting of the piece A having its bottom conformed to the curve which the surface street in cross-section is to have, and provided at its ends'with vertical rollers C, and

with the horizontal rollers E, and with connected means for moving it along, substantially as and for the purposes specified.

3. In a machine for shaping the surface of the road or street bed, the beam A having at each end the vertical rollers C and horizontal rollers E, and adapted to make the curb or IOO IIO

curbs of the street guideway and support of the beam, roller G being located on the curb, and the lower edge of the piece A being suficientl7 deep below the top of the curb to reach and shape the portion S of the street being paved, substantially as and for the purposes specified.

el. In a machine for shaping a road-bed, the beams A, A, and intervening bridgings B and the metal pieces D, secured to the beams and each terminating in an axle D2, carrjying a Wheel or roller C, substantially as and for the purposes specified.

5. ln a machine for shaping a road-bed, the beams A, A, and intervening bridgings B and the metal pieces D, secured to the beams and cach terminating in an axle D2, carry-ing a wheel or roller C, each end of a beam A carrying a horizontal roller E, substantially as and for the purposes specified.

G. In a machine for shaping a road-bed, the beams A, A, and intervening bridgings B and the metal pieces D, secured to the beams and each terminating in an axle D2, carrying a wheel or roller C, and the strap-pieces H, and

draft irons or pieces as G, G2, substantially as and for the purposes specified.

7A In the construction of a road or street bed, having curbs, the following apparatus, the beam A Whose length is a part of the Width of the street and provided at each end with the supporting-wheels C and horizontal wheels E, and the shiftable temporary rail X2, substantially as and for the purposes specified.

8. In a machine for shaping road and street beds, the portion A having its under side oonforming to the shape of the street to be made, and provided at each end with vertical rollers for supporting the portion A, and also provided at one end With the horizontal roller E for abutting against the structure or support upon which the adjacent vertical Wheel rolls and thereby avoiding friction with said support, substantially,T as and for the purposes specified.

DAVID ADDISON VALKER.

Attest:

A. S. LUDLOW, K. SMITH. 

